Machine for use in drawing patterns in molding.



S. STRETTLES. MAGHINE FOR USE IN DRAWING PATTERNS IN MOLDING APPLICATIONFILED 25.15, 1909. A d A n Eanenfa 1f9 I5@ SHEETS--SEIBET l.

NS IN MOLDINGL FEB ` PLICATHN PILEM S. STRETTLES. MACHINE FOR USE INDRAWNG PATTERNS IN MOLDING.

APPLICATION FILED 1518,15, 1909, A 1 v 1 Patenten nee. 909.

4 SHEETS-SHEET 3,

terns from molding boxes of small Fig. i illustrates a longitudinalSTEPHEN STRETTLES, OF

PATENT onirica.

MANCHESTER, ENGLAND.

MACHINE FOR USE IN DRAWING PATTERNS IN MOLDING.

Specification of Letters Patent.

Patented Dee. '7, 1909.

.application tiled February 15, 1909. Serial No. 478,077.

To all 'whom it may concern:

Be it known that l, STEPHEN S'rini'rrnus,i a subject of the King ofGreat Britain and Ireland, and resident of Manchester, Eng-A land, haveinvented certain new and useful Improvements in Machines for Use inDrawing hatterns in Molding, of which the following is a specification.1

This invention refers to and consists of a knew or improved constructionof machine by which patterns can be readily withdrawn from the boxesused inl molding, and which can be readily adjusted for use inwithdrawing patterns from molding boxes of different sizes.

Upon the accompanying drawing, Figure l illustratesa front elevation(partly broken away) of the improved machine with its several parts inthe normal, at rest, position and suitable for use in drawinpatimensions. F ig. 2 illustrates a sectional plan on line www. Fig. 3illustrates a transverse sectional elevation of Fig. 1 on line y-y.

sectional'levation of Fig. 2 on line z-e. Fig. I5 il'lus.- trates afurther longitudinal elevation of Fig. 2 but with the parts shown in theposition they occupy when supporting the pattern prior to its beingwithdrawn from the mold, and as adapted for drawing patterns frommoldiiw boxes of large dimensions. Figs. to 12 illustrate 'detailsseparately.

1 According to the invention, the improved machine consists of a tubularopen-endedbody part a, the interior of which is bored to a true cylinderlike thevcylinder of an engine. Such body part a is mounted horizontallyupon any suitable form of support, but preferably upon a hollow pillaror pedestal I, the lower part of which is broadened out to forni a tooton which the pedestal may rest. Usually the pedestal will be such as tostand upon a door and lsupport the part a at a height suitable to aworkman.

The machine also consists of two further tubular parts c', 02, which titone in each of the open ends of the said body part a, hereinafter calledthe cylinder. 'lhese two further tubular parts, hereinafter called theslides, tit telescopically in the cylinder ends and are capable of beingcaused to approach and recede from each other. At its outer end eachslide is closed icy a cap or cover c3 held in position by lugs and setscrews. y

The means used i for adj be of any suitable, kind.; y'()ne@arran ementconsists of lugs ornbosses'dbred an 'screwV threaded transverselyandrone secured to the interior face of the slide c and the othersecured to the interior face of the slide 02, the two lugs, when theslides are at their inner position, lying near to each other. f lThesaid adjusting means also consist of a screw e formed with right andleft handed screw threadsv which respectively screw through the bosses dwhich are screw threaded to suit. The central' partof the srew which isleft plain, is held rigidly ytothe cyhnderia' by a `urther lug'o'r'bossf, this'lattervr so formed and vmountedas'fboth wsupport the screw e andwhen desired clamp the screw against rotation. One or both covers c3 isor are preferably narrower in one direction than the other in order toallow'room for an opening through which the boss of a' handle' such as emay be inserted to engage the end of the screw c which is squared, seeFig. l. haii'dle is removed a small'swivel*platelet is provided. 5"" E"'lo kcover theopening when the) In one with or 'ttedfto the slides c; c2are'L l I the two end frames g', g2 'ofthe lmachine upon the top edgesof which will rest the molding box from which the pattern requires to bewithdrawn. For-supporting extra large molding boxes metal strips 3 maybe applied tov the top edges of the frames. E l

Within the cylinder a is la bark, seelflig. 4, and-in the said pillarsupport-b isjarode' .to which is connected `the saidlbar andfwhic'h" iscapable of risingand'fallin'g. *By y'means nlally held elevated, thusholdin the bar at its highest point within the oy inder. To allow forthe use of a lon spring the rod z' is made hollow. Also within thecylinder a is a lever Z mounted upona stud or axis m which passestransversely through-the wall of the cylinder and is provided with a handle 11.. Fitted to the said barywhich is suit#- ably7 nected directlsleeves 'g carried by the bar, are two uprights or osts r which extendupward through ho es or slots in the cylinder and slides, and when thebar It is at its highest ends of the elow the top ames. To siich upperguided by the arrangement shown 'in plan in placed in position,

y the 25I Fig. l2, such arrangement consisting of .a fitment r2 fixed tothe end frame and a cap fr fixed to the litment. The sleeves g may bemade to inclose the ends or' the bar, but the will eachl preferably bemade as shown an be held to the bar by a V-pointed key piece slidablvfitting a V-groove z" in the bar z' and held to the .sleeve by setscrews t', t2, see Figs. 6 and 7. The set screws t pass loosely throughslots in the ends of the piece s and screw into the sleeve, while theset screw t2 screws through the sleeve transversely and into the piece sholding' it against the rod or freeing it. i In using the improvedmachine and with posts r in the position shov'in in Fig. 5, thb moldingbox is placed on the end frames g', 72, the plate carried by thepostslying immediately below it and being lir'mly held-v in suchposition while the ramming oi the mold is taking place. When it isrequired to draw the pattern from the molding box the handle n isrotated in the direction of the arrow, thereby causing the lever Z to berotated and the bar 7L, owing to the movement of the pin p, to belowered and with it the posts and pattern, the spring j within thesupport balancing the weight until the attern lies clear of the moldingbox. rlChe ox being removed and a fresh one being the pattern is raised.by the reverse, rotation of thehandle n and thus made ready for the nextmolding operation.

Or, if thc machine is used for pattern danwing only, the patternisremoved and fthe plate raised ready for the next box. To stillen thecylinder and also afford a suitable support for the pattern to rest uponwhen fully lowered, the cylinder is provided with flanges of, the topfaces of which lie slightly above the periphery of the cylinder. Toprevent the bar and posts moving downward prior to the vpattern beinglowered, the lever Z-engages a pin on the rod z', or a pin il, onthelever engages a shoulder o in rod e', see Figs. 4 and To insure ofthe rod rising up and down smoothly in the pedestal, small anti-frictionrollers w may be provided against which vertical ridges Z of the rod maybear. The rollers will preferably be carried by studs w adjustable bymeans of screws 102 in the fixed cap ney toward the ridges 2, see Figs.l and 2.

When the slides o', c2 lie at the shortest distance apart the end framesserve to support the smallest size of molding box. To allow of theframes supporting larger sizes position, a bz r the screw en".

the slides are moved outward by the screw e. ln moving the slides c', c2the posts i' are also moved, the sleeves g v hich carry them movingendwise on the bar as the slides are adjusted. tly closing .the outerends of the slides, sand, etc., is excluded, and by providing conicalend caps they allow of the adjustment el the slides while alwayscoverirng the en d's or' the har '/i.

lo help 1n arresting the upward movements ol the bar and hold it whilethe molding box is being rammed, also to enable the attendant to releasethe handle n, a small inclined stop je' provided against which the leverZvi/edges when the )ar is fully raised.

l. it. machine for usefiu drawing patterns in molding comprising anopen-ended cylinder,'a vertical iollow support on which the cylinder ishorizontally mounted, two further cylindrical parts or slidestelescopically fitting the s cylinder, end frames carried by the saidslides, means for adjusting the said slides longitudinally and furthermeans for holding them in any desired within the said cylinder andextending` from end to end, a rod centrally connehted to the seid banand slidably fittingY the said hollow supp rt, a spring for ba ancing orhelping to be. i e thev weight of the rod and bai', and any hing carriedthereby, a rotary member w in the Cylinder and adapted to engage 'thehar, and, on. heing ro' ed, raise or loa/ei 't s bar, uprights or postscarried by ba and extending through the cylinder wall and on beingraised adapted to sin; tly below the top edges of the end framessubstantially as herein set forth.

ln a machine `tor use i drara'in patterns iu molding` an opou--em'ledeyliiulei, and a hollow ver .cal support on which the c uindcr ishorizontally mounted. in combination with two cylindrical slides ittinetelesco ic- 2 i;

right and left ally Within the cylinderp handed screw, s ou the slideswith which l [l a, further lug and a screwed sti l bv which the screw issuplierted and clamped, substantially as herein set 3. ln machine" drwing patterns in molding, the con with an openion ended c ,n ler wu nopenings in, the top part and. at each end. and a hollow verticalsupport on which the cylinder is horizontally nmunted, `ol" a bararranged horizontally within the cylinder, a rod coi'mected to the barand slidingly fitting the said hollow vertical support, sleevesadiustably mounted on the har, up ts or posts carried by the sleeves andpro] loting upward through the openings in the cylinr. a .rotary memberwithin the cylinder and a, short stud or axis for such member passingtransversely through the wzl'l ol 'the cylinder, and means whereby themember on beingrotated raises l low Vertical Support on. which thecylinfle'i und lowers jthe bar, and with it the posts, substantially :sherein seiJ forth.

4. In Vnmcliines. for drawing peterns in molding, @Hopen-ended Cylinderand a, hollow verticalpillar on which the cylinder' is horizontallymounted, a bar arranged, horizontally Within the cylinder and a rodLconnvctml io the bar at right angles and sliciably litlingl l'lio saidhollow verical support, and suirl rod having' vertical grooves producingvertical parallel ridges, anti-friction rollers nml means .forndjustziloly supporting the rolle axes, subslantinlly as hereinsetforth.

5. In nmrliinos icor drawing patterns in molding, :in open-endedCylinder and n holl' horizontally mounted, in combination will: twocylindrical. slides elescopionlly ttingg: the cylinder incl euch slideeloee. :it one enel by e oep-having en openi for allowing or' theinsersion of the boss iain;n -lrey l in- (ile, n swivel cover for (lopening? pair of Vertical frames sized lo elle sliilf on which themolding bon; may reali, suo stanially as herein set for'rli.

In Witness whereof @l have Lereunto my hand in the presence or it" YoWitnesses.

.Vnesses F. i). fummo-'roma linen WTQRRALL

